Tank you ! By the way doo you have any experience using the SoftwareSerial Libary and RFM12B Libary together ? Im tring to connect RFID Reader ID-12LA tx line to pin 9 on the Moteino it works when i don't include the RFM12B libary... Maybe both libary uses the same Interrupts?

/** * Search for a specific tag in the database */int findTag(char tagValue[MAX_ID] ) { for (int thisCard = 0; thisCard < numberOfTags; thisCard++) { // Check if the tag value matches this row in the tag database if(strcmp(tagValue, allowedTags[thisCard]) == 0) { // The row in the database starts at 0, so add 1 to the result so // that the card ID starts from 1 instead (0 represents "no match") return(thisCard + 1); } } // If we don't find the tag return a tag ID of 0 to show there was no match return(0);}

Yes I have used software serial with RFM12B before, no issues at 57600baud. But if you are heavy on the interrupts side you might have to slow down the baud rate. The pins for software serial should not interfere with the RFM interrupt.